CODEWITHSUNDEEP
c++arrays
Jonathan Yu
Jonathan Yu

Reputation: 31

How do I make multi dimensional in C++?

I have this array 

int sequence[2][3][2][2][50][2] = {
{
    {1},
    {{
      {2, 4}, 
      {3, 5}
     },
     {255,0,0}
    }
  },
  {
    {2},
    {{
      {3, 4}, 
      {2, 6}
     },
    {0,0,255}
    }
  }
};

Whenever I try to index the first multi dimensional array, using 

int frame[2] = {sequence[1]}

I get this error "invalid conversion for 'int (*)[2][2][50][2]' to 'int' [-fpermissive]

What am I doing wrong?

Upvotes: 1

Views: 84

Answers (1)

eerorika
eerorika

Reputation: 238471

Whenever I try to index the first multi dimensional array, using

int frame[2] = {sequence[1]}

Let's simplify the syntax you use:

int frame[2] = {/*list of ints*/}

This initializes a one dimensional array of 2 int, using a brace-enclosed list of integers.

An element of your outermost multi-dimensional array with arity k, is also a multi-dimensional array (with arity k-1). It is not an int.

So, there is nothing wrong with how you index the multi-dimensional array. What is wrong, is trying to initialize an array if int with a multi-dimensional array as the first value.

How should I initialize it then?

It is impossible to answer because it is not clear which of the integer values within the multi-dimensional array you want to use to initialize.

Here is a syntactically correct way to initialize frame:

int frame[2] = {sequence[0][0][0][0][0][0], sequence[0][0][0][0][0][1]};

It uses the values in the first subarray of the first subarray of the first subarray of the first subarray of the first subarray of the outermost array.

Upvotes: 1

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